Tektronix TekRanger 2 TFS3031, Руководство по обслуживанию

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Specifications – TekRanger 2 (serial nos. B052000 and above)
TFS3031 TekRanger/TekRanger 2 Service Manual
1–63
Table 1–69: Vertical System Dynamic Range (850 nm Multimode, Options 01 and 03)
Characteristic Performance Requirement Supplemental Information
Dynamic Range
Pulse Width
10 m
5 m
1 m
typical:
27 dB 31 dB
24.5 dB
17.0 dB 21 dB
SNR =1. Dynamic range SNR=1 is
defined as the difference between
the extrapolated backscatter level
at the start of the fiber and the
RMS
1
noise floor.
Dynamic range 98% is defined as
the difference between the
extrapolated backscatter level at
the start of the fiber and the 98%
level of the noise.
(DR 98%) = (DR SNR=1) Ć 1.5 dB.
Measured using a 62.5
µ
m, 0.28
NA GI fiber after 3 minutes of
averaging.
A 0.5 dB front panel loss is
assumed.
Temperature Coefficient of
Dynamic Range -0.15 dB/
o
C for T 25
o
C, typical
1. RMS in this test is defined as the standard deviation.
Table 1–70: System Measurement Accuracy (850 nm Multimode, Options 01 and 03)
Characteristic Performance Requirement Supplemental Information
Distance ±5.0 m Verified on the TFS3031 Distance
Accuracy Test Fixture on every
instrument built in Manufacturing
and on instruments that are
repaired in Service.
Intellitrace only.
Does not take into account errors
in index of refraction and cabling
factor.